It is that we can’t finish it on time.
A. so a hard job
B. such hard a work
C. such a hard job
D. so hard a work
网友回答
A. so a hard job
B. such hard a work
(答案→)C. such a hard job
D. so hard a work
解析：考查固定用法。So后面要接形容词或者副词；such后面要接名词或者名词短语。本题的such a hard job=so hard s job如此困难的一份工作；句意：这是如此严重的一份工作以至于你不能准时完成它。故C正确。
考点;考查固定用法